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当人成长发育至青春期,男女青年的声带都发生了显著的变化。男孩从幼童时的6～8毫米长,逐渐增长到20～24毫米,并且增宽增厚;女孩则逐渐增长到15～18毫米,并且在增长的同时相对变窄。结果导致了男女声音出现了显著改变。稚气的童音逐渐消失了,男孩的发音频率低,声调变得粗而低沉:女孩的发音频率高,声调变得高而尖细。这一变化时期称
As people grow and develop into adolescence, the vocal cords of both sexes have undergone significant changes. Boys grow from 6 to 8 millimeters long as young children and gradually increase to 20 to 24 millimeters, broadening and thickening; girls gradually grow to 15 to 18 millimeters and grow relatively narrow at the same time. The result was a dramatic change in the voice of both men and women. Childish childish voice gradually disappeared, the boy’s pronunciation frequency is low, the tone becomes thick and low: the girl’s pronunciation frequency is high, the tone becomes high and taut. The period of change said